This seems to work well with large (133) lines and if I need
to shrink the window the horizontal scrollbar pops up and
I can still see the line width unbroken. I'd say if you increase
the screen buffer size width to whatever you want to match linesize
and leave the window size width at 133, it should work. Just save
the settings for all sessions and the shortcut can now be
copied/renamed
to other sessions.
Ie, I don't use glogin to control the window size in line mode
other than to define the linesize. It's all done by the windoze
shortcut beyond that.